MATIF is the only major exchange offering a 24-hour non-interrupted trading cycle accommodating two distinct non-overlapping trading mechanisms. We find that trading volume on the floor is significantly higher than that on GLOBEX around the switch of trading mechanism. GLOBEX is mainly used by institutions to hedge their cash positions. The higher trading volume on the floor may be attributed to several factors: trade immediacy vs. transaction cost, liquidity trading by locals, inertia to trade under a new mechanism, and transparency vs. anonymity. In addition, the floor's open is unique with large interday return volatility.